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Technical Deep Dive: How CVE-2026-12390 Works
CVE-2026-12390 is a Type Confusion vulnerability (CWE-843) affecting AzeoTech DAQFactory versions 21.1 and prior. The flaw resides in the software’s parsing logic when handling `.ctl` (control) configuration files. During deserialization of these files, DAQFactory fails to properly validate and sanitize data type information, allowing an attacker to craft a malicious `.ctl` file that tricks the application into misinterpreting memory structures.
Type confusion vulnerabilities occur when a program uses a value of one data type in a context that expects another, incompatible data type. In this specific case, when DAQFactory processes a specially crafted `.ctl` file, the application’s internal memory allocator or object handler may treat a pointer, object, or variable as an incorrect type. This can lead to the program interpreting arbitrary memory locations as executable code or as legitimate objects with attacker-controlled function pointers.
The attack vector is local (AV:L) and requires user interaction (UI:A) – specifically, an unsuspecting user must open the malicious `.ctl` file. Once triggered, the vulnerability grants the attacker arbitrary code execution within the context of the DAQFactory application. This is particularly dangerous in industrial control systems (ICS) and data acquisition environments where DAQFactory is commonly deployed for critical manufacturing operations. The flaw maps to MITRE ATT&CK technique T1203 (Exploitation for Client Execution) and carries a CVSS v3.1 base score of 7.8 (HIGH) and a CVSS v4.0 base score of 8.4 (HIGH).
DailyCVE Form:
Platform: ……. AzeoTech DAQFactory
Version: …….. <= 21.1
Vulnerability :.. Type Confusion (CWE-843)
Severity: ……. 8.4 (HIGH) / 7.8 (HIGH)
date: ……….. 2026-06-18
Prediction: ….. 2026-07-30
What Undercode Say: Analytics & Threat Intelligence
EPSS Score: 0.15% (probability of exploitation in the next 30 days) – ~4th percentile
Exploit Status: No public proof-of-concept (PoC) exists as of current reporting
ATT&CK Mapping: T1203 – Exploitation for Client Execution
CISA Recommended Mitigations:
- Operate in “Safe Mode” when loading documents from untrusted sources
- Store `.ctl` files in a folder only writeable by admin-level users
- Apply a document editing password to documents
Network Defense:
- Minimize network exposure for all control system devices
- Locate control system networks behind firewalls, isolated from business networks
- Use VPNs for remote access (with latest updates)
How Exploit: CVE-2026-12390
Attack Prerequisites:
- Target system running DAQFactory ≤ 21.1
- Attacker must convince user to open a malicious `.ctl` file
- No authentication required (PR:N)
Exploit Workflow:
1. Attacker crafts a malicious .ctl file with type-confusion payload Example: Overwriting type metadata in the .ctl structure echo "malicious_type_confusion_payload" > exploit.ctl 2. Deliver via phishing, supply chain, or shared network folder 3. Victim opens exploit.ctl in DAQFactory 4. Type confusion triggers during deserialization 5. Arbitrary code execution in DAQFactory context
Conceptual Proof-of-Concept Snippet (Illustrative):
Hypothetical .ctl file generator demonstrating type confusion
This is for educational purposes only
def generate_malicious_ctl():
Craft a .ctl file that mismatches type tags
to force DAQFactory to misinterpret memory
payload = b"\x41" 1024 Overflow/buffer manipulation
type_confusion_header = b"\x01\x02\x03\x04" Invalid type identifiers
malicious_ctl = type_confusion_header + payload
with open("exploit.ctl", "wb") as f:
f.write(malicious_ctl)
print("[] Malicious .ctl file generated.")
Detection Commands:
Monitor for .ctl file access anomalies auditctl -w /path/to/ctl/files -p rwxa -k ctl_activity Check for unexpected DAQFactory processes ps aux | grep -i DAQFactory Search for suspicious .ctl files modified recently find / -name ".ctl" -mtime -1 -type f 2>/dev/null
Protection: From This CVE
Immediate Actions:
- Upgrade to DAQFactory version 21.2 or later – contains the fix with strengthened type validation during file processing
- Restrict file upload capabilities and validate `.ctl` file integrity before processing
- Implement application whitelisting to prevent unauthorized execution of malicious files
Configuration Hardening:
Restrict .ctl file write permissions to admin only chmod 750 /path/to/ctl/files chown root:admin /path/to/ctl/files Enable Safe Mode (if available in DAQFactory settings) Set document editing password policy
Network-Level Protections:
- Isolate DAQFactory systems from the internet and untrusted networks
- Deploy IDS/IPS signatures to detect malicious `.ctl` file transfers
- Monitor for unusual process creation or child processes spawned by DAQFactory
Long-Term Measures:
- Conduct regular vulnerability assessments to identify unpatched instances
- Implement strict file validation controls for all configuration files
- Segment ICS networks and enforce least-privilege access
Impact: CVE-2026-12390
| Impact Area | Description |
|-|-|
| Confidentiality | HIGH – Attacker can read sensitive data from the compromised system |
| Integrity | HIGH – Attacker can modify or corrupt system files and configurations |
| Availability | HIGH – Attacker can disrupt or halt DAQFactory operations, impacting ICS processes |
| Scope | Unchanged – The vulnerability does not spread to other security domains |
| Attack Complexity | LOW – Requires only a crafted file and user interaction |
| Privileges Required | NONE – No authentication needed to exploit |
| User Interaction | REQUIRED – Victim must open the malicious `.ctl` file |
Operational Consequences:
- Critical Manufacturing Disruption: DAQFactory is widely used in industrial control systems; exploitation can halt production lines
- Supply Chain Risk: Malicious `.ctl` files can be embedded in legitimate software updates or shared configurations
- Lateral Movement: Once code execution is achieved, attackers can pivot to other systems in the OT/IT network
- Data Exfiltration: Sensitive industrial process data, intellectual property, or credentials can be stolen
Compliance Exposure:
- PCI DSS 4.0 (6.2) – Failure to protect against known vulnerabilities
- NYDFS 23 NYCRR 500 – Inadequate cybersecurity policy
- DORA 5 – ICT risk management deficiencies
- NIS2 Directive 21 – Cybersecurity risk management failures
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Sources:
Reported By: nvd.nist.gov
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